THE FUCACE.K Oi' .lAl'AN. 67 



vra: Schixophftlln Ykndo. Plate IX. Fi<,^ 1-P,. 



Prelim. List of Jaj). Fiic. p. 155. 



= Halochloa Schizophylla Ki'xz.: lieber d. Eigciit. (Bot. Zeitung 184.3.) 



s. öß.—Ici: Spec. Alg. p. 632.— /(/.: Phyc. Gen. p. .367.— /f/.: 



Tab. Pliyc. Xr. Taf. I. fig. 2. 

 = Sargassum jmnatifidum IIarv. p.p.:Charact.of New Alg. p. 327. — Dk 



Toni : Syll. Alg. III. p. 20.— J. A<i.: Anal. Alg. Cont. III. p. 50. 



Description of the variety. Sargassum jyciteiis Ag. varies greatly 

 accordiug to the condition of the environment and the season ; 

 still, there is a distinct form found in the southern part of Japan. 

 This form accords with the description and the illustration of 

 Halochloa Schizophylla Kütz. It is, however, by no means a 

 species, as we sometimes encounter a specimen which shows inter- 

 mediate characters, especially when sterile. 



The radical leaves of the variety are simple or pinuately 

 lobed as in the type. They are, however, thin and membranaceous, 

 beset with several irregular rows of inconspicuous cryptostomata ; 

 the margins of the simple leaves or the segments of the divided 

 leaves are minutely dentated, and the axial laminœ of the divided 

 leaves are usually armed with a few sharp spinous processes on 

 the margins. The lower fulcrant leaves are lobed into several 

 lateral segments, each segment, as well as the axial lamina being 

 irregularly but sharply serrated. Very frequently two vesicles 

 are found serially connected, the upper one being crowned with a 

 divided leaflet at the top. Occasionally one or two simple leaflets 

 were found on a vesicle at some distance from the corona. (PI. 

 VIII. fig. 8). 



The leaves on the upper portions are as in the type. In 

 some dwarfed forms, however, they are often short and profusely 

 ramose, apparently approaching certain leaves of Sargassum pin- 

 natifidum. Some extreme forms show a resemblance to the lower 



